Electric motor



(No Model.) a Sheets-Sheet 1.

s. 0. c. GURRIE. ELECTRIC MOTOR.

No. 419,245i Patented Jan. 14, 1890.

m0 Model'.) 3 Sheets-Sheet 2.

' S. G. G. CURRIE.

ELECTRIC MOTOR.

No. 419,245. Patented Jan. 14, 1890.

6 66313 m iomaQuddm Films, Pilate-lithograph, Wnhinglon, D, c.

6N0 Mode l.) 3 Sheets-Sheet 3.

S. C. C. OURRIE.

ELEGTRIO MOTOR."

Patented Jan. 14, 1890.

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UNITED STATES PATENT-OFFICE.

STANLEY C. C. CURRIE, OF PHILADELPHIA, PENNSYLVANIA, ASSIGNOR TO THE UNITED ELECTRIC IMPROVEMENT COMPANY, OF GLOUCESTER CITY, NEW JERSEY.

ELECTRIC MOTOR.

SPECIFICATION forming part of Letters Patent No. 419,245, dated January 14, 1890.

Application filed July 25, 1889. Serial No. 318,672. (No model.)

To all whom it may concern: mutatorbars. The coils of one winding Be it known that I, STANLEY C. C. CURRIE, are opposite the spaces between the coils of of Philadelphia, Pennsylvania, have invented adjacent windings; in other words, the coils certain new and useful Improvements in of the second layer or series of windings em- Electric Motors, of which the following is a brace adjoining cores included in the differspecification. ent coils of the first winding. The coils of The object of my invention is to increase the third winding embrace adjoining cores the efliciency and improve the operation of included in different coils of the second windelectric motors. By my improvements I obing, and the coils of the fourth winding are To tain a constant and even torsion, an equal similarly related to those of the third. distribution of forces at all periods of revo- To explain more specifically, starting from lution, and avoid dead-points. To this endI commutator-bar No. 1, the Wire extends in employ multiple field-poles and cause the both directions and is coiled in a reverse. changes of polarity in the poles of the armasense around adjoining pairs of poles, con- I 5 ture to pass from to neutral and then to nections being made between coils with the and Vice versa. commutator-bars 1 5, &c. Starting from bar In the accompanying drawings, Figures 1, 2 the wire passes between two poles envel- 2, 3, 4, 5, 6, 7, and 8 are diagram views illusoped by a coil of the first winding, extends crating diiferent positions of a motor having in both directions, and is wound in a reverse 2o sixteen commutator-bars, sixteen armaturesense around adjoining pairs of poles, conpoles, and four series of windings. Figs. 9, nections being made between the coils with 10,11, and 12 are similar views of a motor the bars 2 6, &c. When the brushes are on having eight commutator-bars and two series bars connected with the first winding-for of windings. instance, upon bars 1 and 9 in Fig. 1the 25 Themachineillustrated comprises two fieldfirst winding only is in circuit and the polarimagnets of three poles each arranged on opties of the armature will be as indicated posite sides of a cylindrical armature. On that is, the four poles at the top of the armaone side the center field-magnet pole is, say, ture will be the four poles at the bottom of sign and the two. outside ones and of the armature will be r, and on each side 3 on the opposite side of the central pole is of the armature the two poles nearest the and the outside ones in other Words, opbottom poles will be and the two nearposite poles are of unlike polarity. The arest the top poles will be Then the mature indicated in the diagram is of a cylinbrushes are upon bars 1 and 2 and 9 and drical toothed type. Each set of field-mag- 10, Fig. 2, the three top poles will be and 35 nets consists of one coil A, wound upon the then, looking to the left in the direction of central core, Fig.1,and two exterior poles a. rotation, the poles will be neutral, minus, Referring to Figs. 1 to 8, the armature is neutral, plus, neutral, minus, minus, minus, provided with sixteen poles b, and they are neutral, plus, neutral, minus, neutral. The wound throughout with four distinct series or signs and on the inside of the windings 4 sets of windings. The first set of windings, of course indicate the polarities at the ciror that nearest the commutator, is connected cumference of the armature. In each case 'with commutator-bars 1 5 9 13. The second it will be perceived that the polarities are set is connected with the bars 2 6 10 14:; the such as to cause the revolution of the armathird set with the bars 3, 7, 11, and 15; the ture with a practically even torsion or strain. 45 fourth set with the bars 4 8 12 16. In Fig. 3 the brushes are upon bars con-' 5 Each winding comprises a series of coils, nected with the second winding; in Fig. 4, and each coil envelops two poles of the armawith the second and third windings; in Fig. ture, adjoining pairs of poles being wound 5, with the third winding only; in Fig. 6,with in dilferent directions and the wires conthe third and fourth; in Fig. 7, with the 50 nected between coils with their proper comfourth only, and in Fig. 8 with the fourth xco and fifth. From these, diagrams it is clear that each pole of the armature in passing from or becomes first neutral during one portion or stage of the revolution and then of the opposite polarity. Vhen the brushes throw two windings into action, as in Figs. 2, 4:, 6, and S, the armature is doubly magnetized at top and bottombetween the field-poles, whereas those points directly opposite the poles are neutral and those on each side between the middle and upper and lower field-poles are active and of a polarity to be attracted in the direction of rotation. The course of the current in all the winding is shown by the arrow-heads. I prefer to eX- tend the upper and lower field-poles concentrically with the armature, as indicated at 3 to afford full opportunity for action between these poles and the armature. Of course this method of winding may be applied to armatures of any suitable type.

In Figs. 9, 10, 11, and 12 I have shown the application of my invention to a motor having eight commutator-bars and two sets of winding, each winding being connected with alternate bars in the commutator. The armature has eight poles, and each pole is wound with a coil of each winding, adjoining coils in each winding being wound in a reverse sense, and on each pole the coils of the second winding are wound reversely to those of the first. In Figs. 10 and 12, where both windings are in circuit, the upper and lower poles are respectively doubly magnetized minus and plus, while the intermediate poles are neutral.

The polarities in the different positions of the armature are plainly marked in the drawings, which speak for themselves, and more specific description seems unnecessary.

In this form of machine, as well as in that shown in other figures of the drawings, the armature-poles, either or are for a portion of a revolution neutral before becoming of opposite polarity.

I claim as my invention 1. The combination, with opposite sets of field-magnet poles, each having a middle pole of given polarity and outside poles of opposite polarity, unlike poles in the two sets being opposite each other, of an interposed multipolar armature wound with independent circuits, each winding or circuit consisting of a series of coils wound alternately in reverse direction, and the commutator bars and brushes, substantially as set forth.

2. The combination, with opposite sets of field-magnet poles, each having a middle pole of given polarity and outside poles of opposite polarity, unlike poles in the two sets of field-magnets being opposite each other, of an interposed multipolar armature having independent windings, each connected with its commutator-bars, each winding consisting of a series of coils wound in a reverse sense around adjoining pairs of poles, and each pair of poles included in a coil of one circuit being poles included in different coils of another circuit, substantially as set forth.

3. A multipolar armature having multiple windings, each of which is connected with its commutator-bars, and each consisting of a series of coils wound in a reverse sense around adjoining pairs of poles, and each pair of poles included in a coil of one winding being adjoining poles included in different coils of another winding, substantially as set forth.

4. In an electric motor, the combination, with the field-magnets, of the multipolar armature, the poles of which are each independently wound in different circuits, and the commutator. with the bars of which the armature-circuits are connected, substantially as set forth.

5. In an electric motor, the combination, substantially as set forth, of the field-magnets, the multipolar armature having independent windings traversing all the poles of the armature, each winding consisting of coils alternately reversely wound, and the commutator, with equidistant bars of which each circuit or windingis connected,in the manner described.

In testimony whereof I have hereunto subscribed my name.

STANLEY C. C. CURRIE.

Witnesses:

GEO. MESTRAL, EDWARD l. MACLEAN. 

